Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total cost	$ 32,122	$ 18,195
Less: Accumulated depreciation	(5,461)	(3,364)
Premises and equipment, net	26,661	14,831
Buildings and Land [Member]
Property Plant And Equipment [Line Items]
Total cost	25,517	13,925
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Total cost	41	0
Furniture, Fixtures and Equipment [Member]
Property Plant And Equipment [Line Items]
Total cost	6,191	3,945
Software [Member]
Property Plant And Equipment [Line Items]
Total cost	$ 373	$ 325